Volvo Penta 3.0 GS, Operator'S Manual

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If electrical connections are reversed, or wires are disconnected when the key switch is ON or the engine is
running, sensitive electrical components may be immediately damaged. Do not turn off the main battery
switch until the engine has stopped.
Battery cables
The following are the minimum specifications for stranded copper cables from the motor to the battery for all models.
The maximum length is 20 feet regardless of cable diameter.
•
0 to 10 ft. (3.05 m) require a 1/0 AWG (80 MWG) cable
•
10 to 15 ft. (3.05 to 4.6 m) require a 2/0 AWG (100 MWG) cable
•
15 to 20 ft. (4.6 to 6.1 m) require a 3/0 AWG (120 MWG) cable
1. Do not use aluminum core battery cables.
2. Failure to use battery cables of recommended gauge and material could result in poor starting and electri-
cal component damage.
Batteries and connections
Note: Whenever you replace your battery, read and understand the information supplied with it before you begin
installation.
1. The engine start battery must be a heavy duty, 12-volt, 650 CCA battery con-
structed for marine use.
2. All other batteries must be heavy duty and constructed for marine use. They can
be either vented/refillable, maintenance-free, or deep-cycle with a CCA or INCA
rating.
3. Use bolts and nuts to secure battery cables to the battery terminals. Do not use
wing nuts to secure battery cables, even if they were supplied with the battery.
4. Tighten all battery connections. Loose battery connections may cause damage
to the engine’s electrical system.
5. Service electrical components only while the engine is off. Be careful when identifying positive and negative battery
cables and terminals. If you touch the wrong terminal with a battery cable, even briefly, the motor’s charging
system may be damaged.
The battery terminal connections must always be insulated. If the battery mounting system does not cover the
connections, install protective covers. This will help prevent shorting or arcing at the battery terminals.
1. Do not expose the battery to electrical sparks or an open flame.
2. Do not use jumper cables and a booster battery to start the engine.
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